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08-13-2020, 10:41 AM   #1
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Hello

Hi all from Ontario Canada


---------- Post added 08-13-20 at 10:47 AM ----------

I have a Sigma 600mm f8 mirror lens and the filter holder unit is broken. Would anyone know where I could find one? Thank you for your time

08-13-2020, 11:07 AM   #2
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Did you talk to Gentec? - they're the distributor for Sigma in Canada, and they do some repair-related work.
Contact Us | Sigma Corporation of Canada
08-13-2020, 11:28 AM   #3
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Thank you ProfessorBuzz, I will give them a try
08-13-2020, 12:18 PM   #4
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QuoteOriginally posted by oldtreeguy Quote
Hi all from Ontario Canada


---------- Post added 08-13-20 at 10:47 AM ----------

I have a Sigma 600mm f8 mirror lens and the filter holder unit is broken. Would anyone know where I could find one? Thank you for your time
Welcome to Pentax Forums.

Does the filter holder look like this?



If so, Sigma no longer supports this lens. I bought one new in the early 1980's, and several years ago I discovered the holder had a crack in it. It eventually broke. I contacted Sigma and they pretty much blew me off, with "that lens is ancient" and "we no longer support such old equipment".

I found one on eBay in Olympus mount cheap, and bought it just for the filter holder.

08-13-2020, 12:45 PM   #5
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Welcome to Pentax Forums.
08-14-2020, 04:57 PM   #6
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QuoteOriginally posted by Racer X 69 Quote
Welcome to Pentax Forums.

Does the filter holder look like this?



If so, Sigma no longer supports this lens. I bought one new in the early 1980's, and several years ago I discovered the holder had a crack in it. It eventually broke. I contacted Sigma and they pretty much blew me off, with "that lens is ancient" and "we no longer support such old equipment".

I found one on eBay in Olympus mount cheap, and bought it just for the filter holder.
Thank you Racer x 69, yes that's the culprit. Sigma's response to my query was that "we don't stock parts of that type any more". I've been shopping on eBay for a deal but ...... Thank you for your time.
08-14-2020, 05:34 PM   #7
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QuoteOriginally posted by oldtreeguy Quote
Thank you Racer x 69, yes that's the culprit. Sigma's response to my query was that "we don't stock parts of that type any more". I've been shopping on eBay for a deal but ...... Thank you for your time.
I bet that someone with a 3D printer, and a way to do a 3D scan of a good one could produce some that would be every bit as good as the original.

For what it is worth, if someone has the resources, and wants to make a few, I might be persuaded to loan my one good one as a master to be scanned.

08-14-2020, 06:42 PM   #8
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Hi from Australia.
08-16-2020, 02:00 AM   #9
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Welcome to the forum, good luck with your search.
08-16-2020, 05:12 PM   #10
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Thank you Kerrowdown, stayin' on it!
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